Shaker-driving mechanism



April 22, 1924. 1,491,583 I H. E. COBB SHAKER DRIVING MECHANISM Filed April 12 1925 3 Sheets-Shet 1 0000 -'0000 -0000 -ooooo H ,oooooe WITNESSES April 22 1924.

Filed April 12 1925 H. E. COBB SHAKER DRIVING MECHANI SM 3 Sheets-Sheet 2 ATTORNEY A ril 22, 1924. 1,491,583

H. E. COBB SHAKER DRIVING MECHANISM Filed April 12 1923 3 Sheets-Sheet 5 Patented Apr. 22, 1924.

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SHAKER-DRiVIfiG MEoHAriIsM.

Application filed April 12,1923. Serial No. a m;

T 0 all whom it may concern 7 Be it known that I, HENRY E. Gone, a citizen of the United States, residing at Jermyn, in the county of Lackawanna and State of Pennsylvania, have invented new and useful Improvements in Shaker-Driving Mechanisms, of which the following is a specification.

This invention relates to shakers such as are used for sorting and grading coal, grain and other dry materials, removing weed seeds from grain, and many other analogous purposes, and has for its object the provision of a novel drive mechanism which will avoid the pounding which is the usual accoinpaniment to the action of the ordinary and well known mechanism, the transmission in this instance consisting of a peculiar gearing arrangement and a sprocket and chainsystem which will insure proper operation with the minimum amount of jarring or pounding.

An important object is the provision of a drive mechanism of this character which will be comparatively simple and inexpensive in construction and installation,which may be associated with shakersof different types, and which will be a general improvement in the art.

ith theabove and other objects and advantages in view the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a plan view of the mechanism,

Figure 2 is a side. elevation showing one type of shaker mounting,

Figure 3 is a side elevation showing another type of shaker mounting,

Figure 4 is a face view of the mutilated main gear,

Figure 5 is a fragmentary plan view showing the use of bevel gears.

Referring more particularly to the drawings the letter A designates a suitable frame work supporting tracks B above which are mounted shaker frames G mounted on wheels D which roll upon the tracks. J ournaled through the frame at the opposite ends thereof are horizontal shafts 10 and 11 upon which are mounted sprockets 12 and 13 about which are trained chains 14 and 15 respectively which have their ends secured to the upper and lower decks of the shaker structure as shown at 16. It is of course intended that these upper and lower decks or members be reciprocated in opposite directions toeffect shaking action on whatever material is being sifted or sorted. I 1

The essential feature of the present invention is the provision of peculiar drive means for rotating the shaft 10. This means consists of a shaft 17 disposed at right angles thereto and journaled insuitabl'e bearings 18.

Secured on this shaft'is a pulley 19 driven by a belt 20 trained about a power pulley 21 driven by any suitable motor or engine.

On one end of the shaft 17 is a crown gear 21 mutilated to provide groups of teeth 22 alternating with blank spaces 23. On the shaft 10 are spurgears 24 with which the gear '21 meshes.

In the operation it will be seen that whenthe shaft 17 is driven and the gear 21; rotated, one group of tee'th'22 will mesh with one gear 24 at the time that one of the blank spaces 23'is opposite the other gear 24 which 10 will be turned first in one direction andv then in the other which will result of course in turning the-sprockets 12 correspondingly and these sprockets will move the chains 14 in one direction and then the other so that the shaker members G will be reciprocated simultaneously but in opposite directions for effecting their action. The shaft 11 is turned in a manner corresponding to the movement of the shaft 10 owing to the fact thatthe chains 15 are trained about the sprockets 13.

It is preferable to provide take up bearings or tension devices 26 associated with the shaft 11 for the purpose of shifting this shaft laterally as may be necessary to take up any slack in the chains 14 and 15.

In-Figure 3 the arrangement is exactly the same except that the shaker frame E to which the chains14 and 15 are connected are not mounted on rails but aresuspended from flexible hangers F.

'In Figure 5 I have illustrated a slight modification in which the crown gear 21 is replaced by a bevel gear 27 mutilated in exactly the same manner and meshing with bevel gears 28 which correspond to the spur gears 24 of the first described form. The operation is of course identically the same as in the use of the crown and spur gears.

From the foregoing description and a study of the drawings it will be apparent that I have thus provided a simply constructed drive mechanism for shakers which will be comparatively smooth in action and in which the pounding, shaking and jarring incidental to the use of the ordinary cranks and the like will be entirely eliminated While an absolutely positive and efiicient drive is insured.

A v *y notable feature is the fact that my sh er driving mechanism gearing can be arranged on the present eccentric an crank shafts of equivalent machines or de vices for the same purpose and be of great value in doing away with the jarring and pounding incidental to the use of cranks. The driving mechanism is equally Well adapted for use on coal jigs Without making any particular changes in the construction and arrangement of parts as the principle remains the same in all cases.

While I have shown and described the referred embodiment of the invention it is of course to he understood that'l reserve the right to make such changes in the form. construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described my, invention 1 claim:

1. in a shaker mechanism including movably mounted shaker members, shafts arranged in parallel relation beyond the ends of the shaker members, sprockets on said shafts. chains trained about said sprockets and having their ends secured to the adjacent ends of the shaker members. and power driven mutilated gearing for rotatlng one shaft first in one direction and then in the other.

2. In a shaker mechanism including movably mounted shaker members, shafts an ranged in parallel relation beyond the ends. of the shaker members. sprockets on said shafts, chains trained about said sprockets and having their ends secured to the adjacent c-nds of the shaker members. and power driven means for rotating one shaft first in one direction and then in the other, said means consisting of a third shaft disposed at right angles to the first named shafts and power driven, and gear connections between said last named shaft and one of said first named shafts.

3. In a shaker mechanism including movably mounted shaker members, shafts arranged in parallel relation beyond the ends of the shaker members, sprockets on said shafts, chains trained about said sprockets and having their ends secured to the adjacent ends of the shaker members, and power driven means for rotating one shaft first in one direction and then in the other, said means onsisting of a third shaft disposed at right angles to the first named shafts and power driven, and gear connections between said last named shaft and one of said first named shafts, consisting of a. mutilated gear on the last named shaft and a pair of gears on said one of the first named shafts mesh- With said mutilated gear.

In a shaker mechanism including movly mounted shaker members, shafts arranged in parallel relation beyond the ends of the shaker members, sprockets on said shafts. chains trained about said sprockets and having their'ends secured to the adiacen'r ends of the shaker members. and power driven'means for rotating one shaft first in one direction and thenin the other consisting of a third shaft arranged at right anglee to one the first named shafts and power driven, a mutilated gear on said last named shaft provided with groups of teeth alternating with blank spaces, and apair of gears on said one of the first named shafts meshing with said mutilated gear whereby to be rotated thereby in alternately opposite directions.

In testimony whereof I afiix my signature.

HENRY E. COBB. 

